P0BBD
DTC P0BBD
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P0BBD
- Hybrid Battery Pack Variation High
Typical Scan Tool Data
Circuit/System Description
The hybrid battery assembly consists of 40 individual batteries. Each battery is rated at 7.2 volts. The batteries are connected together in series circuit. The battery energy control module (BECM) monitors the hybrid battery voltage on every two batteries for a total of 20 locations, across the battery assembly. The BECM monitors the calculated battery voltage (sum of the voltages from the 20 individual battery measurements). The BECM multiplies each individual battery voltage measurement by 20 and compares the individual reading to the calculated battery voltage of the pack. If the BECM detects a voltage difference greater than a specified value on any two consecutive hybrid battery voltage measurements this DTC will set.
Conditions for Running the DTC
* The vehicle power mode is RUN.
* Accessory voltage is 9-18 volts.
* All hybrid individual battery voltages have passed the hybrid battery circuit performance diagnostic.
Conditions for Setting the DTC
The BECM detects the calculated voltage, minus any hybrid battery voltage, times 20 is greater than 70 volts for 3 seconds on any two consecutive hybrid battery voltage measurements.
Action Taken When the DTC Sets
DTC P0BBD is a Type B DTC.
Conditions for Clearing the DTC
DTC P0BBD is a Type B DTC.
Special Tools
* EL-48571 High Voltage Battery Pin Out Box
* EL-48900 HEV Safety Kit
Circuit/System Verification
1. Ignition ON, observe the DTC information with a scan tool. DTC P0BBD should not set.
^ If DTC P0BBD is set, refer to DTC P0BBD.
2. With a scan tool, monitor all 1 through 20 hybrid battery voltage parameters. All hybrid battery voltage parameters should be within 11-19 volts and within 3 volts of each other.
3. Operate the vehicle within the Conditions for Running the DTCs. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
Verify that DTC P0B3C, P0B41, P0B46, P0B4B, P0B50, P0B55, P0B5A, P0B5F, P0B64, P0B69, P0B6E, P0B73, P0B78, P0B7D, P0B82, P0B87, P0B8C, P0B91, P0B96, or P0B9B is not set.
If any of the listed DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle. Diagnostic Trouble Code Descriptions
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage
* Identify how to test for the presence of high voltage
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.
* Failure to follow the procedures exactly as written may result in serious injury or death.
Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling.
1. Remove the drive motor generator battery case upper cover.
2. Disconnect the X4 harness connector at the BECM.
3. Connect the EL-48571 high voltage battery pin out box to the X4 harness connector.
4. Install the high voltage manual disconnect lever.
5. Test for 11-19 volts across all 20 battery voltage reference circuits.
^ If not within the specified range, replace the drive motor battery assembly.
^ If all circuits test normal, replaced the BECM.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair. Verification Tests
* Drive Motor Generator Battery Replacement